Flour sifter



2 Sheets-Shegtl L. E. LOVEJOY FLOUR SIFTER Filed May s 1926 1 Dec. 14 1926.

Dec. 14 1.926. 7 1,610,300

1.. E. LOVEJOY FLOUR SIFTER Filed May 5. 1926 2 sheets-sheet 2 auoentoz lillialz Lol/ejoy a f flitouwg;

Patented Eec; l4,

LILL'IA'N n. LovEJoY; on orPoJa'rUNrrY, WASHINGTON;

FLOUR Application filed May 5,

This invention relates to kitchen utensils and more particularly to a flour sifter. One object of the invention is to provide the sifter with. means to thoroughly agitate theflour while it is being sifted, i.

7 Another object of the invention is-;to;pro vide a sifter in which air maybe m xed w th the flour during thesiftingoperation and a v very light mass of flour produced.

I Another object of 'the invention isitolso mount the agitators. and airinjectors-that receptacle and serve; to strengthen the walls,

and prevent them. from being readlly bent."

before being removed.

they may be actuatedv from a single; drive Another object offthe invention. isito so construct the sift-er that the flour maybe aft.

successively operated upon anu nber' of times This invention is illustrated in the accom panying drawings,- where n l igure 1- is a vertical sectional view' through theimproved Slftf Fig. 2 is through'the sifter;

. Fig Sis a. viewlshowinga fragment of,

thesifter in side elevation.

. The receptacle or 'bodyv portion thwhich ,may be termed a casing'if so desired is formed of sheetinetal and is cylindrical-and openat its ends. Outwardly extendingbeads 2 are providedtadjacent the ends of the i when the .caps 3 are .put in place. ,LEach cap Y inwardly in"enclosingrelationfto the open is provided. with .a central opening' hem closed by a conical guard 5 which pro e-cts ing and has its apex .6 flattened somewhat and formed with a reduced opening 7 COV..-"

I ered by a screen 8 which is soldered orother wise'firmly secured-torthe guard.- A screen 1 9 which: forms-a part tion is securedlnthe receptacle or casinginterm'ediate its ends by a ring or band 10 and divides the casing-into endcoinpartments, oneofwhich is ,tocontain screen.

the flour to be sifted andthe other serving to receive the ;fiour. as itpasses .throughzthe p A handle ll is disposed at Zone side oft-he casing and'extends-longitudinally thereof with its arms secured tothe casing".

' above and below thescreensothatthesifteri nay beeas'ily; lifted andheld. with either;

. 1heshaft 12 of. the agitatorlwhich as be;

compartment uppermost. Y

referredto as a jdrivensha'ft extends through.

he 3 xia y at the casing Ior'f recep:.'

' t ck.f nd sj u naled. he t 'n P l a transverse. sectional view- 1926. Serial Noi,1 06,938.

which extend diametrically across the casing and'at their ends are formedwith feet 14; soldered or otherwise secured to its walls." Beaters '15' which are preferably formed of;

' -sheetmetal and provided with radiating arms 16 are secured upon the, agitator shaft above and below the screen so thatfiour thoroughly agitated and caused to readily .passqthrough the screen when the sifter is in operation. It will be readily understood that the agitatorsorbeaters will operate witheitherend of the receptacle uppermost,

In order-to impart rotary movement to th'e form acrank handle 18, by means of which idly-secured upon the driving shaft within .thereceptacle and mesheswith a gear 20secured upon the shaft. 12 so that, when the driving shaftcis rotated, rotary bev transmitted to; the shaft 12.

agitator shaft; there has been provided a drivingshaft 17 which extends diametrically a through the receptacle/{and hasfa portion projecting outwardly'therefrom and bent to motion willjW'hen preparing fiourtojbe used for V 1 ing; angel cake and other very light cakes,

placed. in the receptacle or casing may be it may be readily rotated. A gear 19 is rig-p- .it isnecessary to havethe flour thoroughly" aerated'so that air taken up by the flour willcausef the flour to be'very light. I have; therefore, provided the sifter with J fans;

2 1 having air-inlet openings 22 formed therein. .The, fan housings are disposed exeach' of which is:;provided with a housing ternally of'fthe" casing .and secured to the I casingiwall above and below' the screen 9 of the inlet openings 2& is covered by screenand formed with outlets '23- which register 7 ,with inlets 24 cut'in the casingwall; Each 953-;

iiig; as shown at 25, so that the flour will be prevented from passing through the regisa Ttering openings into the fan housings; The" shafts 26 which'rotatably mount the fans 27' disposed in thehousin'gs are journaledin .100 ---the heads, of the fan housingsandy-ext'end {axially thereof with portionsl'projecting ofthe'shafts 26 'andimesh with a large gear froin thefan housingsl .Gears28 are rigid ly mounted upon thev projected 'endportions' no I ' Eli) caps 3 is removed. and the sifter held with the open end of the casing uppermost. The Hour to be sifted is poured into the casing the cap has been replaced,-the crank handle 18 is turned to rotate the drive shaft and impart rotary motion to the agitator shaft and fan shafts; The agitators will cause the flour to pass through the screen and the fans will inject air into the casing above and below the screen. This air will serve to lighten the hour as part of it will be taken upiby the flour- The surplus air will, of course, pass out through the openings 7' which are protected by the screens 8 so that the flour will not be wasted. After the flour has "been passedthrough the screen from the upper compartment into the lower one,

7 the sifter is inverted and the sifting operation repeated so that the, flour is again.

passed through thescreen and additional airmixed with it. This may be repeated any number of timeswithout it being neces sary tOTT-GIHOVBtllB flour from the slfter.

"VVhile'the flour is being subjected to the 40,. r. "GORtEUI'lGI above and below said screen, and means for in ecting air lnto the container above and below said screen.

final. sifting operation, the cap at the lower end of the casing may be removed and the flour. allowed topass directly mto' a mixlng bowl or the caps or the covers may both 7 be left in place until the sifting has been completedand the lower cap then removed and the flour allowed to pass into the mix 'ing bowl. V V V r 1 Having thus described the invention, 1 claim: 3

'1. A sifter comprising a container, a screen in said container, agitators in said .2. A sifter. comprising a container, a screen in said container, agitators in said 7 1 container above and belowsaid screen, means for injecting air 'i-nto'the container above and below said screen, and common means for, actuating said agitators and air-injectng-means. i 7

3; A sifter comprising an open-ended 7 body, closures for the open ends of said body each formed withran .a irwoutlet opening, a screen :inzsai'd body intermediateits ends, ,agitators'in-the body above and below said 7 screen, andmea'ns foriinjecting air into the lbody above and below .said screen.

r; A v'sifter comprising an op'en ended each :formed wvith :an :air outlet open ing',

cones xextendingrinwardly from said :clo-- i-and,.extending .iacross the perforations, a

I screen ain isaid body intermediateite iends,

said driven shaft.

agitators'in said body-above and below said screen, and means for injecting air into said a screen in said body'intermediate its ends, a and the cap'or cover then replaced. After driven shaft rotatably mounted in said body and extending longitudinally thereof through said screen, agitators carried by said shaft at opposite sides of said'screen, a drive shaft extending transversely through said body and having a portion projecting outwardly from thebody and provided with turning means, and means for transmitting rotary movement from said drive shaft to -6.A- sifter comprising" an open-ended hollow body,'closures for the ends of said body, a'screen 'in said body intermediate its ends, a driven shaftjrotatably-mounted in said body and} extending longitudinally thereof through said screen, agitators'carcried by said shaft at opposite sides of saidv screen, a. drive shaft ektendingtransversely through said body and having a portion projecting outwardly from'thefbody and pro vided with turning means,; means for transmitting rotary movement from said drive shaft to said driven shaft, and ablower actuated from saiddriveshaft and adapted to direct anair blast into said body operative relation to saidscreen;

7 A'sifter comprisingan open-ended'hol :low body, closures for the ends of said'body, a screen in said bodyv intermediate its ends. a driven shaft rotatably mounted. in said body and extending longitudinally thereof through said screen, agitators carried by 5 said shaft at oppositesides of said screen, a drive shaft extendingtransversely through said body and having aportioir projecting outwardly from the body and provided with turning means, means for transmitting rotary movement from said drive shaft to said driven shaft, and blowers actuated from.

said drive shaft and adapted to directair -adri-ven shaft rotatably mounted in said;

body and extending longitudinally-thereof through I said --screen, agitators carried by said-shaft at opposite sidesofsaid 'screen, a I drive i shaft extending f transversely '--t=hrough Q'Silld T body and having portion 5 projecting "blasts into said body above and below said m V outwardly from the body andprevided with ibody, closiuesffor-the open ends of said body turning iineans, means -itor"transmitting: ro

tary n10venient trainsaid drive shaft to" said i V driven shaft, blower h sings carried'bysaid, 7

211d housings for di said body to aerate material being screened,

and means for actuating said'blowers' from said drive shaft. 1

9. A sifter comprising an open-ended holsaid shaft at opposite sides of said soreen,a

7 drive shaft'extending transversely through said body and having a portion projecting outwardly from the body and providedwith turning means, means for transmitting ros said fan shafts from said drive shaft.

tary movement from said drive shaft to said driven shaft, blower housings carried by said body and provided with outlets registering with openings in said body above and below said screen, shafts journaled in saidhousings and projecting externally thereof towards said drive shaft, fan blades carried by the last-mentioned shafts within said housin for directin air throu h'theo enb vt: .t:

ingsinto said body, and means for rotatingv In testimony whereof I affix my signature,

LILLIAN' LOVEJOY. L8, 

